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Author Topic: First issue with the saw mill  (Read 923 times)

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Offline Rob30

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First issue with the saw mill
« on: May 14, 2019, 08:16:59 PM »
Broke a blade today on the woodland mill. I think it may have been getting dull and I pushed it too hard. Also having trouble setting the fluid drip for lube. Only about 10-15 hours on the blade. Any ideas on possible causes? I was only cutting softwood. The water drip is dripping on the stabilizer instead of the actual blade.
Also any idea on good sharpeners? I can not find anyone locally that sharpens blades.

Offline Stephen1

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Re: First issue with the saw mill
« Reply #1 on: May 14, 2019, 08:37:14 PM »
It didn't break because it was dull, it broke because it was old in hours. The blades can only go around so many times. Soft wood -hard wood doesnt not really matter in N America.
I only run the blades 2 hrs of sawing time then time to resharpen. It is easier to resharpen if not completly dull. you can expect 500-1000 bd ft before a blade goes dull.
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Offline Rob30

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Re: First issue with the saw mill
« Reply #2 on: May 14, 2019, 09:08:03 PM »
10-15 hours is old? When we bought the machine we were told blades are good for 40 hours of cutting. Maybe that's in total. I have 10 blades, so that would only be 20 hours of cutting?

Offline Chuck White

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Re: First issue with the saw mill
« Reply #3 on: May 14, 2019, 09:08:56 PM »
I agree, the blade had been run too long!

It's a lot like bending a piece of wire, it only bends just so many times and it will break!

Also, to save blade-life, I always disengage the blade before gigging back to the head of the mill, like it says in the book!
~Chuck~
Retired USAF (1989), Retired School Bus Driver (2012), and now a Mobile Sawyer
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Basic mechanical skills are all that's required to maintain a Wood-Mizer

Online Southside

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Re: First issue with the saw mill
« Reply #4 on: May 14, 2019, 09:17:40 PM »
Yes 10-15 hours is too long, WAY too long. 500 BFT is a safe target to remove a band and sharpen it, you want to touch it up before it gets dull and develops gullet cracks. This will give you the longest band life. Think of it the same as rotating your tires, they last longer as a result.  Eventually all bands will fail due to flex life and the nature of steel. You did really well to get what you did out of that one. 

I probably average an hour or two at most. 
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Online YellowHammer

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Re: First issue with the saw mill
« Reply #5 on: May 14, 2019, 10:58:08 PM »
As the say, the band needs to undergo the sharpening and gullet grinding process every few hours of use.
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Offline Magicman

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Re: First issue with the saw mill
« Reply #6 on: May 15, 2019, 08:03:46 AM »
But it broke because it had been run dull.  Any amount of time running dull is too long.  I generally change my blade at noon (4-5 hrs) but occasionally it is mid morning meaning that I will use 3-4 blades during the day.  I suppose that the blades get 5-6+ resharpens before they are rejected.  I say "suppose" because the number of resharpens is an item that does not concern me.  Blades are like diesel, they are expendable and simply an item that is necessary to saw. 

The less dull a blade is when it is removed, the more resharpens it will take and the longer it will last.  Dulling a blade is a blade killer.  :-X
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Offline terrifictimbersllc

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Re: First issue with the saw mill
« Reply #7 on: May 15, 2019, 09:26:59 AM »
Sharpening does 2 things. 

1) It lets the blade cut with much less stress.  
2) It removes little cracks in the gullet (if the full profile is sharpened) which combined with stress will break the blade. 
DJ Hoover, Terrific Timbers LLC,  Mystic CT Woodmizer Million Board Foot Club member. 2019 LT70 Super Wide,  Logrite fetching arch, WM BMS250 sharpener/BMT250 setter.  2001 F350 7.3L PSD 6 spd manual ZF 4x4 Crew Cab Long Bed

Offline Rob30

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Re: First issue with the saw mill
« Reply #8 on: May 15, 2019, 09:21:49 PM »
Thanks everyone, guess a sharpener is the next purchase.


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